65777896782 has 48 divisors (see below), whose sum is σ = 162510107760. Its totient is φ = 19048801536.

The previous prime is 65777896757. The next prime is 65777896783. The reversal of 65777896782 is 28769877756.

65777896782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 65777896782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65777896783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8263732 + ... + 8271687.

It is an arithmetic number, because the mean of its divisors is an integer number (3385627245).

Almost surely, 2^65777896782 is an apocalyptic number.

65777896782 is an abundant number, since it is smaller than the sum of its proper divisors (96732210978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65777896782 is a wasteful number, since it uses less digits than its factorization.

65777896782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16535457 (or 16535454 counting only the distinct ones).

The product of its digits is 497871360, while the sum is 72.

The spelling of 65777896782 in words is "sixty-five billion, seven hundred seventy-seven million, eight hundred ninety-six thousand, seven hundred eighty-two".